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dit : perputaran roda sejauh 440m
jb :
k = 2.phi.r
k = 2 x 22/7 x 28cm
k = 176cm → 1,76 m
perputaran roda = panjang lintasan/keliling roda
perputaran roda = 440m/1,76m = 250
jadi roda harus berputar 250x agar tercapai 440m
K = 2πr
K = 2 x 22/7 x 28
K = 2 x 22 x 4
K = 44 x 4
K = 88 cm = 0,88 m
Roda berputar
0,88 x 440
= 387 kali
Semoga Membantu :)